P016C

Closed Loop Air/Fuel Ratio Control At Limit - System Too Lean

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Poor engine idling
Power Loss
Increased fuel consumption
Possible misfires
Check Engine Light Is On

Causes

Air leaks in the intake tract
DMRV malfunction
Weak fuel pump
Dirty fuel injectors
Clogged fuel filter
Malfunction of oxygen sensors
Problems with the EVAP system
Vacuum leak

How to Fix

Check the intake tract for air leaks
Check the readings of the mass air flow sensor and MAP sensor
Check fuel pressure
Inspect the condition of the fuel injectors
Check the operation of oxygen sensors
Check the EVAP system for leaks
Check vacuum hoses

Related codes

P0171 P0172 P0174 P0300